<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>两栏布局</title>
    <style>
        .left{
            width:200px;
            height:500px;
            background-color: blue;
            float:left;
        }
        .right{
            padding-left:200px;
            width:100%;
            height:500px;
            background-color: blueviolet;
        }
    </style>
</head>
<body>
<div class="left"></div>
<div class="right"></div>
</body>
</html>